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From: Adhemerval Zanella <azanella@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/azanella/bz12683] riscv: Fix Race conditions in pthread cancellation [BZ#12683] Date: Fri, 7 Apr 2023 17:07:56 +0000 (GMT) [thread overview] Message-ID: <20230407170756.2AB94385842C@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fb620d28035829115518e889db77920f7a82d8fd commit fb620d28035829115518e889db77920f7a82d8fd Author: Adhemerval Zanella <adhemerval.zanella@linaro.org> Date: Mon Apr 3 10:57:49 2023 -0300 riscv: Fix Race conditions in pthread cancellation [BZ#12683] By adding the required syscall_cancel.S. Reviewed-by: Andrew Waterman <aswaterman@gmail.com> Diff: --- sysdeps/unix/sysv/linux/riscv/syscall_cancel.S | 67 ++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S new file mode 100644 index 0000000000..742c748d09 --- /dev/null +++ b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S @@ -0,0 +1,67 @@ +/* Cancellable syscall wrapper. Linux/riscv version. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <descr-const.h> + +/* long int __syscall_cancel_arch (int *cancelhandling, + __syscall_arg_t nr, + __syscall_arg_t arg1, + __syscall_arg_t arg2, + __syscall_arg_t arg3, + __syscall_arg_t arg4, + __syscall_arg_t arg5, + __syscall_arg_t arg6) */ + +#ifdef SHARED + .option pic +#else + .option nopic +#endif + +ENTRY (__syscall_cancel_arch) + + .globl __syscall_cancel_arch_start +__syscall_cancel_arch_start: + lw t1, 0(a0) + /* if (*ch & CANCELED_BITMASK) */ + andi t1, t1, TCB_CANCELED_BITMASK + bne t1, zero, 1f + + mv t3, a1 + mv a0, a2 + mv a1, a3 + mv a2, a4 + mv a3, a5 + mv a4, a6 + mv a5, a7 + mv a7, t3 + scall + + .globl __syscall_cancel_arch_end +__syscall_cancel_arch_end: + ret + +1: + addi sp, sp, -16 + cfi_def_cfa_offset (16) + REG_S ra, (16-SZREG)(sp) + cfi_offset (ra, -SZREG) + call __syscall_do_cancel + +END (__syscall_cancel_arch)
next reply other threads:[~2023-04-07 17:07 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-04-07 17:07 Adhemerval Zanella [this message] 2023-04-11 14:19 Adhemerval Zanella
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